cosher vs posset

cosher

verb
  • To treat with fondness; to excessively dote on. 

  • To levy certain exactions or tribute upon; to lodge and eat at the expense of. 

  • To chat in a friendly way. 

posset

verb
  • To treat with possets; to pamper. 

  • To vomit up curdled milk. 

noun
  • A beverage composed of hot milk curdled by some strong infusion, such as wine. 

  • A baby's vomit, comprising curdled milk. 

How often have the words cosher and posset occurred in a corpus of books? (source: Google Ngram Viewer )